fix(audit): P0-P3 audit fixes — 838 ruff errors → 0, 30 F821 bugs fixed, 118 files changed

- P0: hooks.py 3-tuple fix, trigger_dispatcher Contract, contacts/plugin unregister_actions_by_owner
- P0: 5 test files — check_permission mocks removed, hardcoded DB credential → env var
- P1: attachment_service DmsFile via Contract helper, restore_registry/history_hooks dedup
- P1: mail/plugin restore unregister, mcp_client datetime.now(UTC), saved_views/filters patterns
- P1: ProtectedRoute fail-closed, 13 test assertion fixes (bcrypt, DB-URLs, SECRET_KEYs)
- P2: deprecated notifications → post_system_message (3 files), forgejo Base, report_generator lazy import
- P2: webhooks permissions, deps.py/roles.py plugin perms removed, import_export default
- P2: address/tags/entity_links patterns removed, worker.py Contract-Umgehungen fixed
- P2: 28 frontend TODOs (hardcoded constants, deprecated notification API)
- P3: dead code, duplicates, deprecated imports, private attr, __import__ inline
- P3: 8 frontend TODOs (LucideIcons, inline styles, XSS, i18n)
- ruff: 838 → 0 (612 auto-fix + 246 manual + 27 F821 regression fix)
- F821: 30 → 0 (AutomationDefinition, DmsFile, user_id, Path, Any, String)
- Contract-Umgehungen: 2 neue gefunden (worker.py:169, worker.py:280) und gefixt

app/services/contact_folder_permission_service.py

@@ -17,9 +17,8 @@ Mapping:
 from __future__ import annotations
 
 import uuid
-from typing import Any
 
-from sqlalchemy import func, or_, select
+from sqlalchemy import func, select
 from sqlalchemy.ext.asyncio import AsyncSession
 
 from app.models.contact_folder import ContactFolder
@@ -29,7 +28,7 @@ from app.models.user import User
 
 _ENTITY_TYPE = "contact_folder"
 
-from app.core.permissions import PERM_RANK as _PERM_RANK
+from app.core.permissions import PERM_RANK as _PERM_RANK  # noqa: E402
 
 
 def _rank(level: str) -> int:
@@ -425,7 +424,7 @@ async def get_visible_folder_ids(
             chain.append(current_parent)
             current_parent = parent_map.get(current_parent)
 
-        for i, ancestor_id in enumerate(chain):
+        for _i, ancestor_id in enumerate(chain):
             perms = perm_lookup.get(ancestor_id, [])
             for ptype, pid, level in perms:
                 # All permissions inherit after migration